Well, seems the mods may have been all too premature. I was just playing campaign mode, nearly done with a level. As as it was counting down...boom the game freezes on me. So I restarted the PS3, started the game back up and the first thing to appear was this.
Sorry for the quality, but this was taken with my crappy camera off-screen.(click for bigger shot)
And for the record. I have downloaded and imported all the available PS3 mods to date. So not sure which one may be causing it.